# Copyright (c) 2007-2015, Evan Phoenix and contributors
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
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#   may be used to endorse or promote products derived from this software
#   without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

##
# Mixin used to identify classes which have no memory storage.

module ImmediateValue
  def self.included(klass)
    def klass.__allocate__
      raise TypeError, "allocator undefined for #{self}"
    end

    Truffle.privately do
      klass.singleton_class.undef_method(:new)
    end
  end

  def singleton_methods(all=true)
    []
  end

  def private_singleton_methods
    []
  end
  private :private_singleton_methods

  def protected_singleton_methods
    []
  end
  private :protected_singleton_methods

  def dup
    raise TypeError, "can't dup #{self.class.name}"
  end

  def clone
    raise TypeError, "can't clone #{self.class.name}"
  end
end

class NilClass
  include ImmediateValue
end

class FalseClass
  include ImmediateValue
end

class TrueClass
  include ImmediateValue
end

class Symbol
  include ImmediateValue
end

class Integer
  include ImmediateValue
end

class Float
  include ImmediateValue
end
